MSG and stability - RF Cafe Forums
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Post subject: MSG and stability Posted: Sun Feb 12, 2006 11:27 am
Joined: Thu Feb 09, 2006 5:29 am
My transistor is the NE4210S01, bias point VDS = 2 V, ID = 10 mA and at 6 GHz.
I'm doing an availabe gain (Ga) design, keeping my load complex conj of the output reflection, and draw the constant gain circles in the GammaS plane:
I see that the gain circle corresponding to the MSG has some parts inside the stable region. Picking values of GammaS so that I have higher gain than the MSG, I get some GammaL according to the perfect match at the output - and this is also in the stable region! So I have stability both at the input and the output, even though choosing points on having higher gain than the MSG!
Can this be, and if so - why oh why?
Give me a job!